<a href="https://www.tcsindustry.com/html/product/Hyaluronic_Acid_9004-61-9_injections_serum_supplement_cream_pill_for_face.html" rel="nofollow">Hyaluronic acid </a> abbreviated HA; conjugate base hyaluronate), also called hyaluronan, is an anionic, nonsulfated glycosaminoglycan distributed widely throughout connective, epithelial, and neural tissues. It is unique among glycosaminoglycans as it is non-sulfated, forms in the plasma membrane instead of the Golgi apparatus, and can be very large: human synovial HA averages about 7 million Da per molecule, or about 20,000 disaccharide monomers, while other sources mention 3–4 million Da.